Honda TRX70 Fourtrax 1986 User Manual

VALVE STEM
Inspect
each valve for bending. burning, scratches or
abnormal stem wear.
Check valve movement in the guide.
Measure and record each
valve starn 0.0.
SERVICE LIMIT: IN/EX: 5. 40 mm (0.213 inl
VALVE GUIDE
Ream the guide to remove any carbon build- up before check-
ing the valve guide 1.0.
TOOL:
Valve guide reamer
07984 - 098000A Of
07984 - 0980000 (U .S. A.
only)
Measure a nd record each valve guide 1.0. using a small hole
gauge or inside micrometer .
SERVICE LIMIT: IN / EX ; 5.50 mm (0. 217 in)
Determine the stem - ta -guide clearance.
SERVICE LIMIT: IN : 0. 08 mm (0. 003 in)
EX : 0.10 mm (0. 004 in)
NOTE
If the stem -ta-guide clearance exceeds the service limits de-
term ine if a new guide with standard dimensions wou ld
bring the
clearance within tolerance. If so, replace the
guides as necessary and ream to fit.
If the valve guide is replaced, the va lv e seat must be
refaced.
VALVE GUIDE REPlACEMENT
Heat the cylinder head to 1 00 - 150
o
C
(212-300
o
FI With a
hot plate or oven.
'.
To avoid burns, wear hea vy g!o"es when handling Ih e healed
cylinder head.
CAUTION
Do nOI use a torch to heal the cylinder head; it may cause
warping.
Support the cylinder head and drive out the o ld guides from the
combustion chamber side of the cylinder head.
CAUTION
• Avoid damaging Ihe cylinder head.
TOOL:
Valve guide driver, 5.5 mm
07742 - 0010100 or
07942-3290100
CYLINDER HEAD /VAlVES
6-7

Honda TRX70 Fourtrax 1986 Specifications

General

Brand	Honda
Model	TRX70 Fourtrax 1986
Category	Offroad Vehicle
Language	English